/* 基础样式与重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4fc3f7;
    --primary-dark: #03a9f4;
    --primary-light: #80deea;
    --secondary-color: #7e57c2;
    --accent-color: #00e5ff;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --bg-primary: #0a0a2a;
    --bg-secondary: #1a1a4a;
    --bg-card: rgba(255, 255, 255, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: auto;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
    scroll-behavior: auto;
}

/* 页面过渡效果 */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.page-transition.active {
    opacity: 1;
}

/* 流动背景 */
.flow-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(-45deg, #0a0a2a, #1a1a4a, #2a2a6a, #3a3a8a);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    z-index: -2;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

/* 全屏滚动样式 */
.fullpage-section {
    height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-secondary);
    z-index: 10;
    opacity: 0;
    animation: fadeIn 1s ease 2s forwards;
}

.scroll-arrow {
    width: 2px;
    height: 20px;
    background: var(--text-secondary);
    margin: 0.5rem auto 0;
    position: relative;
    animation: bounce 2s infinite;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: -3px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-secondary);
    border-bottom: 2px solid var(--text-secondary);
    transform: rotate(45deg);
}

/* 全屏滚动导航点 */
.fullpage-nav {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.fullpage-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.fullpage-dot.active {
    background: var(--primary-color);
    transform: scale(1.2);
}

.fullpage-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1px solid var(--primary-color);
    opacity: 0;
    transition: var(--transition);
}

.fullpage-dot:hover::after {
    opacity: 1;
}

/* 全屏滚动过渡动画 */
.section-transition {
    transition: transform 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* 移动端隐藏导航点 */
@media (max-width: 768px) {
    .fullpage-nav {
        display: none;
    }
}

/* 粒子画布 */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 40, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 40, 0.95);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* 主内容区 */
main {
    margin-top: 80px;
    min-height: calc(100vh - 160px);
}

/* 经历与发展部分 */
.experience-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.experience-section .section-header {
    margin-bottom: 4rem;
}

/* B站部分样式 */
.bilibili-section {
    padding: 5rem 0;
    background: var(--bg-primary);
}

.bilibili-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.bilibili-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.bilibili-card h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.bilibili-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.bilibili-card ul {
    text-align: left;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.bilibili-card li {
    margin-bottom: 0.8rem;
    line-height: 1.5;
}

/* B站视频容器样式 */
.bilibili-video-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    /* 16:9 宽高比 */
    margin: 1.5rem 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.bilibili-video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 8px;
}

/* 响应式设计 - 时间线 */
@media (max-width: 768px) {
    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 70px !important;
        padding-right: 1rem !important;
        text-align: left !important;
    }

    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        padding-right: 1rem;
    }

    .timeline-item::after {
        left: 24px !important;
        right: auto !important;
    }
}

@media (max-width: 480px) {
    .timeline {
        padding: 1rem;
    }

    .timeline-item {
        padding-left: 60px !important;
    }

    .timeline-content {
        padding: 1.5rem;
    }

    .bilibili-card {
        background: var(--bg-card);
        backdrop-filter: blur(10px);
        padding: 2.5rem;
        border-radius: 12px;
        box-shadow: var(--shadow);
        text-align: center;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .bilibili-title {
        color: var(--primary-color);
        margin-bottom: 1.5rem;
        font-size: 1.4rem;
    }

    .bilibili-actions {
        display: flex;
        gap: 1rem;
        justify-content: center;
        margin-top: 1.5rem;
        flex-wrap: wrap;
    }
}

/* 通用部分样式 */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.highlight {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-3px);
}

/* 英雄区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.6s forwards;
}

.hero-visual {
    position: relative;
    width: 400px;
    height: 400px;
}

.floating-card {
    position: absolute;
    width: 180px;
    height: 180px;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

.floating-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.card-1 {
    top: 0;
    left: 0;
    animation-delay: 0.9s;
    border: 1px solid var(--primary-color);
}

.card-2 {
    top: 50px;
    right: 0;
    animation-delay: 1.2s;
    border: 1px solid var(--secondary-color);
}

.card-3 {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 1.5s;
    border: 1px solid var(--accent-color);
}

.card-content {
    text-align: center;
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.card-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-secondary);
    opacity: 0;
    animation: fadeIn 1s ease 2s forwards;
}

.scroll-arrow {
    width: 2px;
    height: 20px;
    background: var(--text-secondary);
    margin: 0.5rem auto 0;
    position: relative;
    animation: bounce 2s infinite;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: -3px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-secondary);
    border-bottom: 2px solid var(--text-secondary);
    transform: rotate(45deg);
}

/* 项目网格 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.project-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 40, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.tech-tag {
    background: var(--primary-color);
    color: var(--bg-primary);
    padding: 0.3rem 0.7rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-link {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.project-link:hover {
    background: var(--primary-color);
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.project-info p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.project-category {
    display: inline-block;
    padding: 0.3rem 0.7rem;
    background: var(--bg-secondary);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* 技能预览 */
.skills-preview {
    background: var(--bg-secondary);
}

.skills-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 0 2rem;
}

.skill-category {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.skill-item {
    margin-bottom: 1.5rem;
}

.skill-name {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.skill-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease;
}

/* 关于页面样式 */
.about-hero {
    padding: 5rem 0;
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 4rem;
    padding: 0 2rem;
}

.about-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.image-frame {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-color);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateX(-50px);
    animation: fadeInLeft 1s ease forwards;
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-content {
    flex: 1;
    opacity: 0;
    transform: translateX(50px);
    animation: fadeInRight 1s ease forwards;
}

.about-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.about-intro {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.about-text {
    margin-bottom: 2rem;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.about-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 时间线 */
.timeline {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    padding: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-item {
    margin-bottom: 4rem;
    position: relative;
    width: 45%;
    opacity: 1;
    visibility: visible;
    transition: all 0.6s ease;
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 4rem;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 55%;
    padding-left: 4rem;
    text-align: left;
}

.timeline-date {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
    display: block;
}

.timeline-content {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.timeline-company {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
    font-style: italic;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.timeline-item::after {
    content: '';
    position: absolute;
    top: 1.5rem;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(79, 195, 247, 0.3);
    z-index: 3;
    transition: all 0.3s ease;
}

.timeline-item:nth-child(odd)::after {
    right: -8px;
}

.timeline-item:nth-child(even)::after {
    left: -8px;
}

.timeline-item:hover::after {
    transform: scale(1.3);
    box-shadow: 0 0 0 6px rgba(79, 195, 247, 0.4);
}

/* 项目页面样式 */
.projects-hero {
    padding: 5rem 0 2rem;
}

.projects-section {
    padding-top: 0;
}

.projects-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    padding: 0 2rem;
}

.filter-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--text-secondary);
    padding: 0.5rem 1.5rem;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    border-color: var(--primary-color);
}

/* 页脚 */
footer {
    background: var(--bg-secondary);
    padding: 3rem 0;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-color);
}

/* 动画关键帧 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-10px);
    }

    60% {
        transform: translateY(-5px);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .bilibili-card {
        padding: 2rem 1.5rem;
    }

    .bilibili-actions {
        flex-direction: column;
        align-items: center;
    }

    .bilibili-actions .btn {
        width: 100%;
        max-width: 250px;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-primary);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 2rem;
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 3rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-visual {
        width: 300px;
        height: 300px;
    }

    .floating-card {
        width: 140px;
        height: 140px;
    }

    .about-container {
        flex-direction: column;
        gap: 2rem;
    }

    .about-stats {
        justify-content: center;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 60px !important;
        padding-right: 0 !important;
        text-align: left !important;
    }

    .timeline-item::after {
        left: 20px !important;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .skills-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .bilibili-card {
        padding: 1.5rem 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .about-title {
        font-size: 2.2rem;
    }

    .about-stats {
        flex-direction: column;
        gap: 1rem;
    }
}
/* 固定在右侧的音乐控制按钮 */
.music-control.fixed-right {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
}

.music-btn {
    background: rgba(10, 10, 40, 0.9);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: relative;
}

.music-btn:hover {
    background: var(--primary-color);
    transform: scale(1.1);
    box-shadow: 0 0 25px rgba(79, 195, 247, 0.6);
}

.music-btn:hover img {
    filter: brightness(0) invert(0);
}

.music-btn img {
    transition: var(--transition);
    filter: brightness(0) invert(1);
}

/* 音乐播放时的旋转动画 */
.music-btn.playing img {
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 音乐提示文字 */
.music-tooltip {
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(10, 10, 40, 0.9);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    white-space: nowrap;
    margin-right: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border: 1px solid var(--primary-color);
}

.music-btn:hover .music-tooltip {
    opacity: 1;
}

/* 移动端音乐按钮调整 */
@media (max-width: 768px) {
    .music-control.fixed-right {
        right: 1rem;
        bottom: 2rem;
        top: auto;
        transform: none;
    }
    
    .music-btn {
        width: 55px;
        height: 55px;
    }
    
    .music-tooltip {
        display: none;
    }
}

/* 小屏幕设备 */
@media (max-width: 480px) {
    .music-control.fixed-right {
        right: 0.5rem;
        bottom: 1rem;
    }
    
    .music-btn {
        width: 50px;
        height: 50px;
    }
}